Cutting mechanism.



A. E. HILTON.

CUTTING MECHANISM.

APPLICATION FILED NOV. 12. 1915.

Patented July 23, 1918.

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ARTHUR IE. HILTON, NEW YORK, N. "Y1, ASSIGNOH TO B. HOE AND (30., 015 NEW YORK, IN. A. GORPORATION 0F NEW YORK.

CUTTING MECHANISM.

To all whom it may concern:

Be it known that I, ARTHUR E. ltlrn'roiv, a citizen of the United States, residing at New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Cutting liflechanisin, fully described and represented in the following specification and the acconipanying drawings, forming a part of the same. i a

This invention relates to certain improvements in cutting mechanism, and has been designed particularly for use with the rotary cutters employed for cutting sheets with a shear cut, so that they will have clealrcutedges,althougl1 the invention may, if desired, be used with other cutting mechanism.

i It is the special object of the invention to provide an improved construction for insuring the freeing of the severed leading-in edge of the .rnaterial from the cutters and for directing. such severed. leading-in edge into the .path provided for itafter passing the cuti'zei's, so that there will be no catching of such leading-inedge against the cutters or deflection of such edge out of its proper path after the cut.

For a full understanding of the invention,

reference may be had tothe accompanying drawings, in which l igin-e lis a side view, partly broken away, showing the improvedsheet-freeing devices as employed with rotary shear cutters; i

F is a cross sectional view taken on the line 2-2 of Fig. 1;

higJS is a horizontal sectional View taken on the line 3-3 of Fig. 2.

Referring now to the drawings, the invention has been illustrated in connection with a cutting mechanism in which there are employed rotary cutting elements cooperating to produce a shear cut. As illustrated, these cutting devices are in the form of bars 1, 2 suitably secured in rotary cutter carriers, as cylinders 8, 4:. As is usual, provision is made for adjusting one of the bars relatively to the other, the cutter bar 2, in the particular construction illustrated, being so mounted and being so adjusted by the usual wedge construction 5.

In the construction illustrated, Where rotary cutting devices are employed for pro specification of Letters Patent. Patngntigd luly as, 1918, Appfication filed November 12, 1915. Serial No. 61,089.

ducing the shear out, the cutting faces of these bars are arranged angularly to each other, one of the bars cutting against the face of the other. In such constructions, the severed leading-in edge of the web is apt to be caught by the angular face of the cutter bar and thus befdefiected out of the path provided for it beyond the cutters. In accordance with the invention there are provided means for preventing this, by the use of which the sheet is positively freed from the cutter bar, these means furthermore acting to contact with the sheet and to assist inv forwarding the severed leading-in edge of 'theinaterial into the path it is intended to -take beyond the cutters. These means will be of a flexible character, so that during the cuttingoperation they will be C0111- pressed against the sheet and put under tension, and after the severed leading-in edge of the material has passed the cutters they will be released and free the sheet therefrom. lVhiJe these means may be of various characters, in the preferred construction there will. be provided a brush having bristles of suitable length to be compressed to the extent suflicient to provide the necessary sheetfreeing movement when they are released. In the particular construction illustrated, there is provided such a brush having three rows of-bristlcs 6, these bristles being carried in a block or bar 7, located in the cylinder l: closely adjacent and in the rear of the angular cutter 2, which in this particular instance is a cutter having its cutting face extending angularly in a rearward dircction. In the best "constructions, this brush block 7' will be mounted in the cylinder so that it can bereadily detached therefrom.

In the particular construction illustrated the brush block is supported on a transverse ledge 8 formed by grooving the cylinder, and is prevented from siclewise displacement by taking against the wall 9 of the groove and against a head 10 carried on a bolt 11, which also secures the cutter bar 2 in the groove of the cylinder. The brush block 7 is held from upward displacement by a retaining device. While this device may have various configurations, as shown there are provided a suitable number of block-holding arms 12 (one of which is shown) extending from a bracket 13 suitably bolted to the cylinder in a clearance formed therein, the

arm 12 bearing on the block between the bristles. By the removal of this arm or arms the brush block may be removed from the' 'machine and another substituted. The parts of the brush are compressed or put under tension, and are, as illustrated, bent backward by the action of the cutter car- 'riers, and the brush, when it has passed 'recting the severed leading-in edge of the material into the path it is to follow beyond the cutters. In the particular construction illustrated, this is effected by providing a stripper bar 14 suitably secured to the cylinder 3, and located just behind the cutter 1.

" With the construction illustrated and described the severed'leading-in edge of the sheet is kept free of the cutters and is directed in the path provided for it to pass the cutters. While the construction shown and described for efi'ecting this result is preferred, it will be understood that the details of the construction may be varied without departing from the invention, and that the invention may be used with cutter mechanism other than rotary shear cutters.

What is claimed is:

1.. In a cutting mechanism for severing material into lengths, the combination with the cooperating cutting elements, of a brush contacting with the material, the bristles of the brush being compressed during each cut ting operation and released after each cutting operat on. and acting to free the severed leading-1n end of the material from the cut- 0opies of this patent may be obtained for ting elements and to direct such end beyond the cutting elements.

2. In a cutting mechanism for severing material into lengths, the combination with a pair of rotating cutters, of a brush mounted behind and closely adjacent to one of the cutters and in contact with the material during and after the cutting operation and actingto free the severed leading-in edge oi? the material from the cutter, and a stripper contacting with the side of the material opposite the brush.

3. In a cutting mechanism for severing material into lengths, the combination with the cooperating cutting elements, of a re. movable brush carrier and a brush mounted in the carrier, the bristles of the brush being compressed during each cutting operation and released after each cutting operation and acting to free the severed leading-in end of the material from the cutters and direct such end beyond the cutters.

-I. In a cutting mechanism for severing material into lengths, the combination with a pair of rotary cutter knives cooperating to produce a shear cut, of a brush removably mounted behind and closely adjacent to one of the cutters and in contact with the material during and after the cutting operation and acting to free the severed leadingin edge of the material from the cutter.

5. In a cutting mechanism for severing web material into sheets, the combination with a pair of rotary carriers,-of cutter elements carried thereby cooperating to pro duce a shear cut, a brush carrier removably mounted behind and closely adjacent to one of the cutters and extending across the path of the web parallel with the line of cut, and brushes mounted in the carrier and in contact with the material during and after the cutting operation and acting to free the severed leading edge of the web from the cutter.

In testimony whereof, I have hereunto set my hand.

ARTHUR E. HILTON.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

